Structure of the Earth
There are ______________ main layers of the Earth.
What is 4?
Created the Continental Drift Theory.
Who is Alfred Wegener?
Earthquakes and volcanoes are usually located along these.
What are plate boundaries?
The Himalayan Mountains are an example of this type of boundary.
Layer that is in constant motion due to convection currents ______.
What is the mantle?
The presence of lemurs on this remote island off the coast of Africa supports Continental Drift Theory.
What is Madagascar?
The mid-ocean ridge is an example of a ______ boundary and _______ is formed here.
What is divergent boundary and new crust?
The Mariana Trench is an example of this plate boundary.
What is a convergent boundary?
Layer comprised of liquid nickel and iron.
What is the outer core?
Earth's continents were once joined together to form this.
What is Pangaea?
There are two main types of plates, ____ and ___.
What are continental and oceanic?
_________________ are a result of the build up of pressure or friction at a plate boundary.
What are earthquakes?
The thinnest layer of the earth is the ______.
What is the crust or lithosphere?
Continental Drift Theory is supported by animal and plant _____ found on continents that are far apart.
What are fossils?
This is what causes tectonic plates to move.
What are convection currents?
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary?
This layer, composed of molten iron and nickel, is solid due to tremendous pressure.
What is the inner core?
True or false: Most continents move several feet each year.
What is FALSE?
The two types of convergent boundaries.
What are convergent (oceanic plate subducts under a continental plate) and continental convergent (2 continental plates collide)?
These two events can occur on land or in the ocean.
What are earthquakes and volcanoes?